Festool Gmbh

Norbert Morgenstern

Tobias Hofmann

A power tool, in particular a handheld power tool, for example a grinding machine, that includes a tool, an electric motor for driving the tool, and a control unit for actuating the electric motor using a motor current (MI). The control unit has a start-up mode in which the control unit actuates the electric motor in such a way that the electric motor during the start-up mode traverses a rotational speed ramp (DR), at which the rotational speed of the electric motor is increased continuously up to operating rotational speed (ADZ) The control unit is designed to adjust the gradient of the rotational speed ramp (DR) on the basis of an acquired temperature for the start-up mode and/or to adjust the intensity of the motor current (MI) on the basis of the acquired temperature for the start-up mode.

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Böblingen, Germany

Norbert Morgenstern